一种新型非接触式电能表校验装置研究  

Research on a non-contact watt-hour meter calibration device

作　　者：陈旭 张浩淼 张超 程志强 许寅哲 苏迎春 CHEN Xu;ZHANG Haomiao;ZHANG Chao;CHENG Zhiqiang;XU Yinzhe;SU Yingchun(State Grid Ningxia Marketing Service Center(State Grid Ningxia Metrology Center),Ningxia Yinchuan 750000,China)

机构地区：[1]国网宁夏营销服务中心(国网宁夏计量中心),宁夏银川750000

出　　处：《工业仪表与自动化装置》2024年第6期56-62,96,共8页Industrial Instrumentation & Automation

基　　金：国网宁夏营销服务中心群创项目(5229YX230003)。

摘　　要：为应对电能表现场校验中遇到的导线密集、空间受限等难题,设计了一种新型的非接触式校验装置。该装置集电压与电流采集于一身,被测导线的电压采用非接触式测量,电压信号经由精密放大、有源滤波及相位补偿处理后,与电流信号接入至高性能的HLW8032电能计量集成电路,实现高效数据处理。在设计上,电压测量探头创新性地融合了线夹与导电海绵结构,紧密贴合导线,确保了良好的耦合电容稳定性,通过外置电容的智能调控,有效消除了耦合电容变量对测量的干扰。小开口U型电流钳,专为狭小空间优化设计,大大提升了电流采样的便捷性和灵活性。单片机控制系统负责实时采集并处理电压、电流及功率数据,确保测量结果的即时显示,增强了装置的智能化操作体验。样机测试验证了该非接触式电能表校验装置能够提高现场校验的安全性和操作便利性,测量误差小于1.5%,为电能计量的现场校验工作提供了高效、可靠的现代化工具。To tackle challenges like congested wiring and confined spaces in watt-hour meter calibration,this paper introduces a novel non-contact calibration apparatus.Integrating both voltage and current measurements,it employs non-invasive voltage sensing,with the voltage signals undergoing precise amplification,active filtering,and phase compensation before being fed into a high-performance HLW8032 energy metering IC for efficient data handling.The design innovation lies in the voltage measurement probe,ingeniously marrying a wire clamp with a conductive sponge.This design ensures intimate contact with wires,stabilizing coupling capacitance and ingeniously mitigating measurement errors from variable capacitance through intelligent external capacitor adjustments.Furthermore,the adoption of a compact U-shaped current clamp with a narrow opening is tailored for spatially restrictive environments,significantly enhancing the ease and agility of current sampling.A SCM control system oversees the real-time acquisition and processing of voltage,current,and power parameters,ensuring immediate display of measurement results.This not only bolsters the device′s intelligence but also enriches the user′s operational experience.The prototype test verifies that the non-contact watt-hour meter calibration device can improve the safety and operational convenience of on-site calibration,and the measurement is less than 1.5%,which provides an efficient and reliable modern tool for on-site calibration of electric energy measurement.

关 键 词：电能表 非接触式测量 耦合电容 U型小开口电流钳 

分 类 号：TM932[电气工程—电力电子与电力传动]